新疆塔河石炭系油气储层测井最优化评价

油气储层洲井最优化方法评价与常规方法相比具有优越性．最优化方法将设计变量、目标函数、测井响应方程组、约束条件等作为一个整体，通过选择适当的区域参数、初值、最优化方法．求解目标函数，使测井理论值与实际洲井值相比较．达到允许的误差范围收敛时．即求出使非相关函数最小时的解，所求参数是最能反映解释点地层地质因素的目的层参数。本文建立了新疆塔河石炭系油气储层测井响应方程组、测井最优化评价的目标函数，采用最优化SR1、DEP和BFGS变尺度法求解目标函数．取得好的解释效果。

OPTIMIZED LOGGING EVALUATION METHODS FOR CARBONIFEROUS RESERVOIR IN TAHE OILFIELD

Compared to conventional methods, there are many advantages in using optimized logging methods to reservoir evaluation. Optimized logging evaluation methods are integrated in designing varieties, target function, system of equations of logging response and constraint conditions. And then the target function will be solved by appropriately selecting the regional parameters, initial value, optimizing method. The result of the computed value is compared with the real value of logging. If their difference is convergent, the result value will be the most reliable one for describing the real situation. The equations of logging response and target functions of optimized logging evaluating methods are set for Carboniferous reservoir in Tahe Oilfield, Xinjiang province. A better result has been got by using the optimized SR1, DEP and BFGS to solve the target functions.